Monostable IC555-based Morse pulse generator help/questions

monostable ic555

I drew inspiration for this project from this topic and this site.
This is my circuit diagram:

The pulse length varies as T = 1.1 × R1 × C1.
T = time period in seconds (s)
R1 = resistance in ohms
C1 = capacitance in farads (F)

I'm going for approximately a 0.125s cycle, probably less, so .125 ~> 1.1(20000)(0.0000047). I'll be using a 15k resistor with a 0-5k pot. I'm also allowing +/-20% because the 4.7uF capacitor is electrolytic.

I'm just starting out in electronics, but can anyone tell me if this circuit will do what I think it will? I want it to send a brief, timed pulse every time the key (trigger) is depressed. I think I've got the timing down, but who knows? I may not have the battery wired correctly.

Thanks, and I'll let everyone know how the circuit works once I put it together.
Miriax

Re: Monostable IC555-based Morse pulse generator help/questi

A monostable around 555 should work... But how are you going to tx dots and dashes (3 times the dot) for Morse code... you may need another RC for that as well.

Also refer to the data sheet before wiring up for any mistakes (they have a lot of reference schematics): https://www.cs.put.poznan.pl/wswitala/download/pdf/LM555.pdf